74 lines
No EOL
3.5 KiB
C++
74 lines
No EOL
3.5 KiB
C++
// RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output=text -verify %s
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struct S {
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int *x;
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int y;
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};
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S &getSomeReference();
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void test(S *p) {
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S &r = *p; //expected-note {{'r' initialized here}}
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if (p) return;
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//expected-note@-1{{Taking false branch}}
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//expected-note@-2{{Assuming 'p' is null}}
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r.y = 5; // expected-warning {{Access to field 'y' results in a dereference of a null pointer (loaded from variable 'r')}}
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// expected-note@-1{{Access to field 'y' results in a dereference of a null pointer (loaded from variable 'r')}}
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}
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void testRefParam(int *ptr) {
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int &ref = *ptr; // expected-note {{'ref' initialized here}}
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if (ptr)
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// expected-note@-1{{Assuming 'ptr' is null}}
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// expected-note@-2{{Taking false branch}}
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return;
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extern void use(int &ref);
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use(ref); // expected-warning{{Forming reference to null pointer}}
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// expected-note@-1{{Forming reference to null pointer}}
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}
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int testRefToNullPtr() {
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int *p = 0; // expected-note {{'p' initialized to a null pointer value}}
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int *const &p2 = p; // expected-note{{'p2' initialized here}}
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int *p3 = p2; // expected-note {{'p3' initialized to a null pointer value}}
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return *p3; // expected-warning {{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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int testRefToNullPtr2() {
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int *p = 0; // expected-note {{'p' initialized to a null pointer value}}
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int *const &p2 = p; // expected-note{{'p2' initialized here}}
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return *p2; //expected-warning {{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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void testMemberNullPointerDeref() {
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struct Wrapper {char c; int *ptr; };
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Wrapper w = {'a', nullptr}; // expected-note {{'w.ptr' initialized to a null pointer value}}
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*w.ptr = 1; //expected-warning {{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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void testMemberNullReferenceDeref() {
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struct Wrapper {char c; int &ref; };
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Wrapper w = {.c = 'a', .ref = *(int *)0 }; // expected-note {{'w.ref' initialized to a null pointer value}}
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// expected-warning@-1 {{binding dereferenced null pointer to reference has undefined behavior}}
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w.ref = 1; //expected-warning {{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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void testReferenceToPointerWithNullptr() {
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int *i = nullptr; // expected-note {{'i' initialized to a null pointer value}}
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struct Wrapper {char c; int *&a;};
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Wrapper w {'c', i}; // expected-note{{'w.a' initialized here}}
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*(w.a) = 25; // expected-warning {{Dereference of null pointer}}
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// expected-note@-1 {{Dereference of null pointer}}
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}
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void testNullReferenceToPointer() {
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struct Wrapper {char c; int *&a;};
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Wrapper w {'c', *(int **)0 }; // expected-note{{'w.a' initialized to a null pointer value}}
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// expected-warning@-1 {{binding dereferenced null pointer to reference has undefined behavior}}
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w.a = nullptr; // expected-warning {{Dereference of null pointer}}
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// expected-note@-1 {{Dereference of null pointer}}
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} |